Improvement in pumps



UNITED EYERARD S. CROELL, OF AUGUSTA, MAINE.

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent No. 118,206, dated August 2.2, 1871.

To all whom it may concern:

Beit known that I, EVRRARD S. CRownLL, of Augusta, in the county of Kennebec and State ot' Maine, have invented a new and useful Improvement in Force-Pumps; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this speciiication.

This invention is an improvement in the class of force-pumps provided with two sets ci' inlet and outlet-valves, and two pistons simultaneously reciprocated in the same cylinder and in opposite directions. The improvement consists in the arrangement, with the receiving and eduction-chambers of peculiar construction, of three induction and three eduction-valves, whereby water may be constantly drawn into the cylinder and forced out of the same with more uniformity and steadiness, as well as force of iiow, than in allied inventions.

In the accompanying drawing, Figure 1 represents a sectional elevation of my improved force-pump. Fig. 2 is a vertical cross-section of Fig. 1 taken on the line x. Fig. 3 shows the arrangement of the induction and eductionvalves.

Similar letters of reference indicate corresponding parts.

A is the pump-cylinder. B B are the two pistons. C C are the piston-rods. D D are the piston-rod guides. E is the lever by which the pistons are operated. F is the fulcrum-bar of the lever, supported by the cylinder-head' and by the guide-stand D. Gr is the fulcrum-pin. The lever is connected with the piston-rod C by the link H. The piston-rod G is connected with the working-lever by the connecting-rod I, which rod works in a slot in the guide-support Jl. This support J is attached to the cylinder-head the same as at the other end of the pump, and connects with the top of the piston-guide l). K is the receiving-chamber of the pump. L is the inductionpipe. M is the eduction-pipe, which is attached to the support J and held in an upright position thereby. N is a two-way delivery-cock. O is the air-chamber. The pistons B B work to and from the center of the cylinder, receiving water from the chamber K at each end of the pump and between the pistens, there being apairot'x-*alvesthat is, an induction and an eduction-valve-ior that purpose, arranged as seen in Fig. 3. l? represents the induction-valves, and R the eductionvalves, all opening upward. The inductionvalves rise from the pressure of the water to lill the vacuum caused by the movement ofthe pistons, and the cduction-valves rise by the pressure of the water produced by the movement of the piston. The eduction-pipe M is connected with the eduction-chamber S. The course of the water from one chamber to the other is seen in Fig. 2, indica-ted by arrows. By means of the .two-way cock N the water may be discharged either through the spout T or through the tube V, to which a hose may be attached.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent-- The three induction-valves l? l? l? and eduction-valves 1t B. R, receiving-chamber K and eduction-chamber S, cylinder A, and pistons B B, constructed and arranged as shown and described.

EVERARD S. GROWELL.

Witnesses O. G. TURNER, E. H. WALKER. 

